Adjust for QCON schedule; use local registry

dockercoins/docker-compose.yml-ambassador

@@ -28,8 +28,8 @@ webui:
       - redis
     ports:
       - "8000:80"
-    #volumes:
-    #  - "./webui/files/:/files/"
+    volumes:
+      - "./webui/files/:/files/"
 
 redis:
     image: jpetazzo/hamba

dockercoins/docker-compose.yml-extra-hosts

@@ -28,8 +28,8 @@ webui:
       redis: A.B.C.D
     ports:
       - "8000:80"
-    #volumes:
-    #  - "./webui/files/:/files/"
+    volumes:
+      - "./webui/files/:/files/"
 
 #redis:
 #    image: redis

dockercoins/webui/files/index.html

@@ -50,7 +50,7 @@ function refresh () {
             points.push({ x: s2.now, y: speed });
         }
         $("#speed").text("~" + speed.toFixed(1) + " hashes/second");
-        var msg = ("I'm attending the @docker Swarm workshop at @ZenikaIT, "
+        var msg = ("I'm attending the @docker Swarm workshop at @qconlondon, "
                    + "and my #DockerCoins mining rig is crunching "
                    + speed.toFixed(1) + " hashes/second! W00T!");
         $("#tweet").attr(